def is_rect_nonzero(r):
    (_,_,w,h) = r
    return (w > 0) and (h > 0)


class fm_command:
    """A simple example class"""
    def help(self):
        return 'fm_command help'
    def on_msg(self,msg):
        print (msg)

if __name__=="__main__":
    a = fm_command()
    a.help()
